Drupal 7 Module Development

Working with Files and Images
$node->title = 'The World of Crell';
$node->language = LANGUAGE_NONE;
$node->body[LANGUAGE_NONE]['0']['value'] = 'GAHHHH!';
$node->field_image[LANGUAGE_NONE]['0']['fid'] = $file->fid;
node_save($node);
As discussed in Chapter 6, Working with Content, a node is an object and fields
are properties of the object, indexed by language. In terms of this example, the
highlighted line is the most important one. All we need to do, is to associate our file
with the image field, is add the fid of our returned file object to a fid property of
the field's instance. When the node is saved, Drupal will extract all the appropriate
information from the files table and add it to the image field.
That's it! After running this code, you can visit your site's front page and you should
see something like the following:
This simple example shows how easy it is to manage files in Drupal, and should
provide a good jumping off point for further exploration.
As mentioned earlier in the chapter, Drupal 7's File API uses PHP stream wrappers.
It also introduces the ability for developers to create their own PHP stream wrappers
and integrate them with Drupal file handling. Let's take a look at what stream
wrappers are and how developers can use them.
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